Is this something you say is happening on a regular un-infected computer, or is this something that is happening with a type of scumware installed? If it's scumware and they are purchasing this traffic, than that is a major issue. If it is an affiliate running this crap, then it needs to be taken up with the company to shitcan that affiliate and see if the joins are sent elsewhere.
There are a few ways in which this scenario can go...
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